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(No Model.) 4 Sheets-,Sheet 1. D. W. MARMON.

DUST COLLECTOR Patented July 20, 1897.

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(No Model.)

i 4 Sheets-Sheet 2. D. W. MARMON. DUST COLLECTOR. No. 586,742.

Patented July l 20,` 1897.-

(No Model.) 4 sheets-sheet 3. D. W. MARMON.

DUST COLLECTOR. No. 586,742. Patented July 20, 1897.

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(No Model.) 4 Sheets-Sheet 4. D. W. MARMON. DUST COLLECTOR Patented July zo, 1897. 1759512.

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By l

UniTnn STATES PATENT Ormes.

DANIEL IV. MARMON, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NORDYKF. tb MARMON COMPANY, OF SAME PLACE.

DUST-COLLECTOR.

SPECIFICATION forming' part of Letters Patent No. 586,742, dated July 20, 1897. lippnmion ined .Tamm-y 9,1897. senin No. 618,659. (No modem To @ZZ wiz/m, t may concern.

Be it known that I, DANIEL W. MARMoN, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Dust-Collectors, of which the following is a specification.

illy present invention consists in certain improvements upon the variety of dust-collectors forming the subject-matter of certain Letters Patent granted to Allen C. Brantingham, (of which Iatent No. 566,737, dated September l, 1896, is an example,) whereby the cost of construction is reduced, the operation simplified and improved, and accessibility to the working parts rendered more convenient.

A machine embodying said invention will be first fully described, and the novel features thereof then pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof and on which similar letters of reference indicate similar parts, Figure 1 is a view partiallyin side elevation and partially in central vertical section of a machine embodying my improvements; Fig. 2, a top or plan view of the same, the horizontal sprocket-wheels and chain belt at the extreme top being broken away, but their positions being indicated by means of dotted lines; Fig. 3, a detail top or plan view, on an enlarged scale, of an intermittent skewgear forminga feature of this machine; Fig. l, an elevation of the same as seen from the inner side thereof or the point indicated by the dotted line -l et in Fig. 2; Fig. 5, an elevation from the point indicated by the dotted line 5 5 in Fig. 2; Fig. 6, a detail view as seen from the dotted line 6 6 in Figs. 1 and 8; Fig. 7, a detail plan view as seen from the dotted line 7 7 in Figs. 1 and 8; Fig. S, a detail vertical sectional view on the dotted lines S 8 in Figs. 6 and 7; Fig. 9, a detail sectional' 1; Fig. 13, a detail sectional View as seen from the dotted line 13 13 in Fig. 12, and Fig. 14 a detail sectional view through the conveyl er as seen from the dotted line 14c 14 in Fig. 12. The direction of sight from the dotted lines is indicated by the arrows at the ends of said lines.

In said drawings the portions marked A represent the framework of my improved dust-collector; I3, the main shaft of the machine; C, a counter-shaft; D, the central shaft which operates the principal mechanism; E, a hammer mounted on said shaft; F, a lever for operating the hammer; G, a sweep at the lower end of the shaft D Il, a dust-receiving structure also carried by the shaft D; I, the dust-collecting tubes; J, a conveyer-shaft, and K a power-shaft, from which the shaft B and conveyer are usually driven.

The frame or easing A is, generally speaking, similar to the corresponding parts of the Brantingham machines above referred to. It contains at the lower end a dust-chamber, the lower wall or `l'loor w of which is a tight floor, except that it contains an opening leading into the conveyer, as shown in Fig. 12, while the upper wall or ceiling /w/ of said chamber contains numerous perforations, which receive the lower ends of the dust-collecting tubes, as shown in Figs. l and 13. At the upper and lower ends of the frame are suitble bearings for the mechanism. Near the upper end of the frame, at the upper end of the dust-collecting tubes, is a spider consisting of a hub A and bars A2, extending out therefrom and secured to the sides of the frame A. This spider and the adjacent frame parts carry the triangular boards or tops If, to 'which the upper ends of the dust-collecting tubes I are secured, as will be presently more fully explained.

The main shaft B of the machine is a horizontal shaft arranged near the upper end, and from which through various intermediate parts most of the other mechanism of the ma chine is driven. Said shaft B is shown as driven through spur-gears l) and k from the shaft K, which is my preferred arrangement as to this particular. Secured to this shaft about midway its length is the disk or tripwheel B', having projecting pins b', by which the hammer is operated, and at some conven- ICO ient point, preferably near its end, as shown, is a disk B2, having gear-teeth b2, which engage with a corresponding gear C2 on the shaft C and intermittingly drive said shaft C. The gearing just described is what is among mechanics generally denominated a skewgear, in which the teeth are so inclined as to permit the shafts to pass each other, as shown.

The shaft C is a short vertical shaft mounted in suitable bearings preferably near one corner of the machine, and is intermittingly driven, as just described, from the shaft B. On its upper end it carries a sprocket-wheel C', from which a sprocket-chain Zruns to a sprocket-wheel D' on the upper end of the shaft D, and by this means said shaft D is also intermittingly driven at such relative speed as may be desired. In the arrangement shown the speed of the shaft B, as will be readily understood by an examination of the drawings, while not rapid, is even and regular. The speed of the shaft C is somewhat faster while in motionbut moves only intermittingly and is at rest a considerable portion of the time, and the shaft D moves considerably more slowly than but coincidently with the shaft C.

The shaft D is a vertical shaft arranged centrally of the machine and carries the hammer, the sweep, and the dust-receiving structure from point to point. Said shaft is driven, as has just been described, from the shaft C through the sprocket chain or belt Z. Near its upper end it has an arm d, to which the hammer-handle is pivoted, and at the lower end it has a hub d', to which .the sweep Gr is secured, and an arm D2, which carries the dust-receiving devices onto which the dust is deposited from the tubes.

The hammer E consists of a hammer-head and a bifurcated handle, the latter of which passes astride the shaft D and is pivoted by a pivot e to the arm d on said shaft. At the point where it passes said shaft it embraces a trunnion-ring E', to which it is piv oted by pivots e. This trunnion` ring is suitably mounted in a circumferential bearing in the lower end of a sleeve carried from the lever F, as will be presently described, and is free to revolve around said sleeve while caused to move vertically thereby, as will be presently described. The shaft D, therefore, through its arm d, is enabled to drive the hammer in a circular path around the machine, while the mechanism by which said hammer is raised and dropped is permitted to remain in its designed position.

The lever F is pivoted by pivots 0.3 to a hanger A3, depending from the bridgetree A4, forming part of the frame of the machine. Its end is bifurcated, and, as is shown most plainlyin Fig. 6, it passes astride the sleeve F', to which it is pivoted by the pivots f', and passes thence onto a point adjacent to the pins projecting from the tripewheel B', and, as will be readily understood by an examination especially of Figs. 1 and S, is operated by said pins as the shaft B revolves. The trunnion-ring E'. being carried by said sleeve F', the operation is, as the lever is lifted by a pin b', that the sleeve, trunnion-ring, and hammer are also lifted, and as the end of the lever escapes from said pin the hammer will drop and deliver its blow. As will be noticed, there are several pins in the wheel B', and said wheel is in continual rotation, while the shaft D is only moved intermittingly. The hammer is thus raised and let fall several times before being moved to a new point.

rlhe sweep G is rigidly secured to the lower end of the shaft D and operates` in a usual and well-known manner to sweep the dust deposited on the floor of the dust-chamber at the bottom of the machine around and cause it to fall through the opening in the ioor w into the conveyer J, by which conveyer it is driven out of the machine. This sweep is substantiallyidentical in construction with the corresponding part in the Brantingham patent above referred to.

As in many cases, the dust-tubes are arranged in groups or sections, but, as will be presently explained, there are certain new features in my present construction. The dust-receptacle H is, as shown most plainly in Fig. 12, a substantially triangular board, slightly larger of area than a single group or section of dust-tubes, and is adapted to close off the air from one section after another of said tubes as it is driven around by the shaft D. This dust-receptacle is completed by the ribs or flanges x, (see Fig. 13,) which extend downwardly from the upper wall or ceiling w' of the dust-chamber, as shown most plainly in Fig. 13, and said ribs or flanges I- prefer to have terminate in some soft yielding substance, such as felt, for the purpose of mal;- ing an air-tight joint between the parts when in the proper position, the position when at rest under a single section of tubes being shown in said Fig. 13. At one side of said receptacle H is a box-like structure H', extending to near the floor of the dust-chamber, as shown in Figs. 12 and 13, through which the dust may fall as it is scraped off the main portion of the receptacle H as said receptacle passes from one section to another. This box-like device serves to protect the falling dust from the air-current entering the dustchamber and enables it to reach the floor of said chamber with but little if any interference by said air-current. The dust-receptacle H is carried by the arm D2 on the shaft D, and it is held up to proper contact with the ribs or flanges Qc, before described, by means of springs h. The box-like tube H', through which the dust descends, is held rigidly by arms d2 d3, extending out from said arm D2, as shown in Fig. l2.

The dust-tubes I, as has just been stated, are arranged in groups or sections. The lower ends of all these tubes enter suitable perforations in the ceiling w' of the dust-chamber, which of course is stationary and all in one IOO IIO

place. The various sections, however, are rendered effective by means of the boards I, covering the upper ends, which, as best shown in Fig. 2, are substantially triangular in form and are separately and independently mounted upon springs s, carried by brackets fon the framework and by the spider-hub A. These springs normally keep the tubes drawn tightly upwardly, so that they are in the best condition to permit the air to pass t-hrough the cloth of which they are composed while retaining the dust therein. As will be observed by an inspection of the drawings and as will be readily understood, the hammer and the dust-receptacle ll are so arranged that while said dust-receptacle is below one group or section of tubes, thus shutting the air olf therefrom, the hammer is above the same section and delivering its blows upon the top thereof, thus jarring the same and dislodging the dust, which falls down onto said receptacle, from which, when the shaft D is again set in motion, it is swept by the ribs or ianges :u and falls through the boxlike conduit Il' to the floor. The ribs or flanges c are so arranged on the under side of the roof of the dust-chamber as to substantially correspond in position with the edges of the triangular boards T, forming the tops of the dust-tube sections.

The conveyer J is of an ordinary and wellknown form and is located below the floor of the dust-chamber and receives the dust there- Yfrom and conveys it out of the machine in a usual and well-known manner, the passa-ge of air being prevented by an air-lock, as shown in Fig. l-i. Said conveyor is driven by a sprocket chain or belt J from any suitable shaft of the machine.

The shaft K is shown as a driving-shaft by which the shaft B and the conveyer .l are driven, itself being driven by a belt K] from some suitable source of power. (Not shown.)

rllhe operation of the machine may be recapitulated as follows: The dust-laden air enters the dust-chamber and passes thence up into the dust-collecting tubes. These retain the dust while the air passes on out through the meshes of the cloth of which said tubes are composed. One section or group of tubes is eut off from the current and is under the operation of the hammer at the same time and is thus being cleaned. By the mechanism described thc hammer is being continuously raised and let fall, while it and the dust receptacle are intermittingly driven from group to group of the tubes. It will be observed that the hammer mechanism is entirely above the dust-collecting tubes, where it is easily accessible. It is also simple and inexpensive in construction and efficient in operation. By constructing the parts of proper proportional size any desired number of blows can be delivered to each section or group of tubes, and these, while the hammer is in operation, are successively entirely cut off from the current of air.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, in a dust-collector, of groups of dust-collecting tubes arranged radially about a central shaft, said shaft, a hammer pivoted to an arm on said shaft above said tubes, an operating-lever pivotally connected at one end to a support and extending past said shaft to an operating trip-wheel, said trip-wheel, a sleeve surrounding said shaft and having pivotal connections to said lever and te said hammer, one of said connections being in the form of a trunnion-rin g, whereby the ham mer is enabled to be revolved while the lever remains in position, substantially as set forth.

2. The combination, in a dust-collector, of a central shaft, mechanism whereby said shaft is revolved intermittingly, a hammer carried by an arm secured to said shaft and pivotally and revolubly mounted on a sleeve thereon, said sleeve, and means for operating said sleeve.

8. The combination, in a dust-collector, of dust-collecting tubes arranged in groups or sections and secured at the lower end in perforations leading to a dust-chamber, heads to which the upper ends of said tubes are attached and resting against the framework at the outer end and against a flange on a spider at the inner end, said spider consisting of a hub loosely surrounding the shaft and arms extending thence to the sides of the framework, and springs s carried by said hub and supporting the said heads at the inner end, and corresponding springs carried by the framework and supporting said heads at the outer ends, said several parts being arranged and operating' substantially as. shown and described.

4. The combination, in a dust-collector, of a framework and easing having a dust-cham ber therein at the lower end, dust-collecting tubes arranged in groups or sections radially about a central shaft, heads for the tubes composing each group or section carried by springs upon the framework, said springs, said central shaft, a hammer the handle whereof is pivoted to an arm on said shaft, said handle extending thence past said shaft and carrying' the hammer-head upon the opposite end, a trunnion-ring surrounding and carried by a sleeve on said shaft to which said hammer-handle is pivoted, said sleeve, a lever pivotally supported from the framework and bifurcated and passing astride the shaft where it is pivotally connected to the said sleeve, and a shaft carrying a disk or tripwheel containing pins or projections for operatin g said lever, said several parts being arranged and operating substantially as shown and described.

5. The combination, in a dust-collector, of the framework, the groups or sections of dust-collecting tubes, the central shaft, the pivoted hammer carried thereby, a pivoted IIO lever Whereby the hammer is raised and let fall, a shaft for operating said lever, a disk bearing a short toothed segment also on said shaft, a countenshaft running at right angles therewith and bearing a toothed gear with which said segment will engage, said counter-shaft being connected to said central shaft, whereby the main shaft is permitted continuous motion, while said counter-shaft and said central shaft are given intermittent motion substantially as shown and described.

6. The combination,in a dust-collector,with the dust-collecting tubes and suitable mechanism for operating the same, of a dust-chamber below said tubes, ribs or flanges projecting downwardly from the upper Wall or ceiling of said chamber and bounding an area corresponding to that occupied by each group or section of tubes, and a dust receiving structure carried by an arm on the central shaft and consisting of a board or plate of similar size, which, when in position below any given group of tubes, together with said ribs or anges, forms an inclosed receptacle into which the dust may be precipitated from the tubes, where it will remain free from contact with the tubes until swept OEE into the dust-chamber, substantially as shown and described.

In Witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 4th day of December, A. D. 1896.

DANIEL W. MARMON. [L. s]

Witnesses:

CHESTER BRADFORD, JAMES A. WALSH. 

